SB2022092917 - Denial of service in Cisco IOS XE Software for Cisco Catalyst 3650, Catalyst 3850 and Catalyst 9000 Family Switches
Published: September 29, 2022
Security Bulletin ID
SB2022092917
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Handling of Length Parameter Inconsistency (CVE-ID: CVE-2022-20870)
CWE-ID: CWE-130 - Improper Handling of Length Parameter Inconsistency
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation of IPv4 traffic in the egress MPLS packet processing function. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.